非线性波在动脉内传播的数值研究

    A Numerical Study of Propagations of Nonlinear Waves in Arteries

    • 摘要: 伍时桂和李兆治所建设的非线性波传播方程组是做了某些数学简化和变换。无条件稳定的三时间层加权隐式差分方法和SIMPLE方法,分别用来求解动脉壁的运动方程和血液流动方程,得到了包括血液的压力、速度和流量以及动脉壁的位移和速度等非线性脉搏波传播的完全数值解。

       

      Abstract: This paper deals with methods of numerical solutions for problems of nonlinear wave propagations in arteries. Some mathematical reductions and transformation are introduced to the system of equations of nonlinear wave propagations suggested by Wu and Lee. Both the variable weighted implicit method and the SIMPLE method are used to solve the motion equations of arterial walls and the flow equations of blood, respectively. The complete results are obtained, they involve numerical solutions for propagations of the following nonlinear pulse waves:pressure, velocities and flowrate of the blood as well displacements and velocities of the arterial wall.

       

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